Linux VNC black screen)

If the remote Linux VNC desktop has not been input for a long time, when you use VNC view to open the remote Linux desktop, the desktop cannot be displayed, a black screen is displayed, and clicking the keyboard or mouse still does not respond, still a black screen.
In this case, you need to set it on the VNC server.

Edit/root/. VNC/xstartup

[Root @ localhost ~] # Vi/root/. VNC/xstartup

Remove the comments of the following two rows:

Unset session_manager
Exec/etc/X11/xinit/xinitrc

Run the following command to restart the VNC Server:

[Root @ localhost ~] # Vncserver-kill:1
[Root @ localhost ~] # Vncserver:1 

From: http://sqiutz.iteye.com/blog/625571